
/*
 * Copyright (c) 2001 Sun Microsystems, Inc.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *       Sun Microsystems, Inc. for Project JXTA."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Sun", "Sun Microsystems, Inc.", "RosettaChat", "JXTA" and
 *    "Project JXTA" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact Project JXTA at http://www.jxta.org.
 *
 * 5. Products derived from this software may not be called "JXTA",
 *    nor may "JXTA" appear in their name, without prior written
 *    permission of Sun.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL SUN MICROSYSTEMS OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Project JXTA.  For more
 * information on Project JXTA, please see
 * <http://www.jxta.org/>.
 *
 * This license is based on the BSD license adopted by the Apache Foundation.
 */

package net.jxta.myjxta.misc.rosettachat.http;

import java.util.*;

/**
 * Util.java
 *
 * @author James Todd [jwtodd@pacbell.net]
 * @version
 */

public class Util {

	public static final int MINIMUM_UNICODE = 0x7f + 1;

	private static Map getHeaders = null;
	private static Map postHeaders = null;

	static {
		getHeaders = new HashMap();

		getHeaders.put(Constants.MIME.Key.USER_AGENT,
					   Constants.MIME.Value.FALCON);
		getHeaders.put(Constants.MIME.Key.ACCEPT,
					   Constants.MIME.Value.ACCEPT_ALL);
		getHeaders.put(Constants.MIME.Key.CONNECTION,
					   Constants.MIME.Value.KEEP_ALIVE);

		postHeaders = new HashMap();

		postHeaders.putAll(getHeaders);

		postHeaders.put(Constants.MIME.Key.ACCEPT_CHARSET,
						Constants.MIME.Value.CHARSET);
		postHeaders.put(Constants.MIME.Key.CONTENT_TYPE,
						Constants.MIME.Value.URL_FORM_ENCODED);
	};

	public static Map getDefaultGetHeaders() {
		return getHeaders;
	}

	public static Map getDefaultPostHeaders() {
		return postHeaders;
	}

	public static String getCharSet(String contentType) {
		final String defaultCharSet = "UTF8";
		String charSet = null;

		if (contentType != null) {
			String charSetPrefix = "charset=";
			int index = contentType.toLowerCase().indexOf(charSetPrefix);

			if (index > -1) {
				charSet = contentType.substring(index +
												charSetPrefix.length());
			}

			if (charSet != null) {
				if (charSet.equalsIgnoreCase("cp1252")) {
					charSet = "Cp1252";
				} else if (charSet.equalsIgnoreCase("big5")) {
					charSet = "Big5";
				} else if (charSet.equalsIgnoreCase("gb2312")) {
					charSet = "GB2312";
				} else if (charSet.equalsIgnoreCase("shift_jis")) {
					charSet = "SJIS";
				} else if (charSet.equalsIgnoreCase("utf-8")) {
					charSet = defaultCharSet;
				} else {
					charSet = null;
				}
			}
		}

		return ((charSet != null) ? charSet : defaultCharSet);
	}

	public static String toUnicodeEncoded(String data) {
		final int unicodeSize = 4;

		StringBuffer sb = new StringBuffer();

		if (data != null) {
			int l = data.length();

			for (int i = 0; i < l; i++) {
				if (data.charAt(i) >= MINIMUM_UNICODE) {
					sb.append("\\u");

					String s = Integer.toHexString((int)data.charAt(i));

					for (int j = 0; j < unicodeSize - s.length(); j++) {
						sb.append("0");
					}

					sb.append(s);
				} else {
					sb.append(data.charAt(i));
				}
			}
		}

		return sb.toString();
	}
}
